Text props for visibility + value and nullability

[nathanacurtis]

Problem

Anova spec doesn't clearly support the visibility, value and nullability of string properties that map to Figma BOOLEAN, TEXT props.

This requires an Anova configuration where the user can specify the prop naming pattern used, such as Show {prop name} or {prop name} Visible that corresponds to the visibility pairing OR there's a way to autodetect it in the Figma asset (which would be potentially performance intensive/prohibitive).